This specification covers the general requirements for nonestablished reliability(non-ER), established reliability(ER), or space level, axial lead precision, power type, wire wound, fixed resistors having a +25°C ambient operating temperature derated to zero load at +250°C for use in electrical, electronic communication, and associated equipment. These resistors have initial resistance tolerances of ±.5 percent, ±.1 percent, and ±1 percent, and a resistance temperature characteristic as given in table I.